Printed circuit board including electromagnetic bandgap structure

A printed circuit board, comprising:

• an antenna;
• a circuit chip;
• a plurality of metal layers and a plurality of dielectric layers;
• a pair of transmission lines configured to transmit a signal to the antenna;
• and
• an electromagnetic bandgap structure disposed between the antenna and the circuit chip in the printed circuit board and configured to prevent an electromagnetic wave from being transmitted from the circuit chip to the antenna,
• wherein the electromagnetic bandgap structure comprises a dielectric layer;
• a plurality of conductive plates;
• and a stitching via configured to electrically connect the conductive plates to each other, and
• wherein the stitching via passes through the dielectric layer, and a part of the stitching via is placed in a planar surface that is different from a planar surface in which the conductive plates are placed.